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APPLICATION ARCHITECTURE
implements a "top of loop" test that allows the
loop to
be
executed zero times.
2.3.3.3 Miscellaneous Instructions
The 80386 Bound instruction can be used
to
verify that an
array
subscript
is
within the
bounds
of
the array. There are instructions for
setting and clearing flags, and for loading
and
storing the status byte
of
the Flags register.
The
80287
and
80387 supply the instructions
that
an operating system needs to initialize the
coprocessor, handle coprocessor exceptions,
and save and restore the coprocessor's state.
Finally,
of
course, the 80386 has a No Opera-
tion instruction.
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